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Патент USA US2131112

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Sept. 27, 1938.
A. MA'RCH'EV
DUPLICATING MECHANISM
Filed April 5, 1957
2,131,112,
4 Sheets-Sheet 1
férllegzs
Sept. 2 7, 1938.
A. MARCHEV'
DUPLICATING MECHANISM
Filed April 5, 1937
j.
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2,131,112
4 Sheets-Sheet 2
‘Sept-27,1938.
‘
MARCH“
_
DUPLICATVING MECHANISM
7 Filed April 5, 1957
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2,131,112
'
,4'Sheets-Shéet s
Sept. 27, 1938.
A. MARCHEV'
DUPLICATING MECHANISM
FilQd April 5, 1937
3 .
2,131,112
4‘ Sheets-Sheet 4
jlfred Afarckéd'
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Patented Sept. 27, 1938
' UNITED JSTATES
‘
2,131,112
1-
"DUPIJCATINGY‘MECHANISM
.
.
‘ " "
Alfred Marchev, La Grange, ‘111., assignoii to
Ditto, Incorporated, Chicago, 111., a-corpora'tion 'of West Virginia
L
Application April 5, 1937, Serial _No. 135,127,“, " 8 Claims. (01. 101-1325
This invention relates, to duplicating machines 'of'a feed unit '19, the detailsof which willrbe de;
and is particularlyadapted toibe‘ embodied in "scribed more fully- hereina‘fter; "Suitable strip
rotary duplicating machines of the type in'which ping rollers 20 and 277i cooperatefwith,aystripping
a drum is provided with aigelatin band adapted ‘bar '22.to remove sh’eet's‘ fromthedrum and deq ,
to receive impressions from master sheets’. The
impressions are subsequently imparted to copy
sheets which are brought into contact with the
gelatin surface of the band.
>
One form of the invention is embodied in a
10 machine of this character, such, for example, as
that shown in the prior application of Alfred
liver the removed sheetslto a receiving’ tray 23, in"L'5
theusualmanner.,_
I.
‘.7
r
V
I‘
' ‘The feedunit’ l9 preferably comprises aframe
work suitably Supported in, the sideffra'mes l0
and l I.' This frameworljisupports'a‘margin ban},
24 and a feed chute comprising 'ajg‘uide plate '25, }'10
a second guide plate 26,,and’ a lockout device ‘21.
Marchev, Serial No. 55,969,v ?led December 24,, ‘The function and operationfof‘the guidevplates
1935, for improvements in'Duplicating apparatus. 25 and 26, and the lockout device‘ 21‘, arefshown
The present invention comprises mechanism and described in detail’in my priorf‘application,
15 of an improved character for preventing damage Serial No. 44,523,1i1eq October 11, 1935.
to the gelatin surface by the initial contact with
the platen roller. The improved machine com
prises means operable automatically-‘as the for
ward edge of the gelatin band approaches the
platen roller to movethe platen roller out of. the
way and then bring it down upon the. gelatin
The feed unit i9 also1comprisesj a sponge rub
ber platen roller 28, which is.yie1dingly mounted
in a pair of ‘end plates 29 ‘and 30 of the feed
unit IS. The platen‘ rollerf_28 is". mounted by”
means of. stub shafts 3| andf?isee Figal), ?xed 20
in the ends of theplaten‘roller. 28. ' Each stub
band, thereby avoiding damage'to the band by‘ shaft is yieldingly supported inits ‘(and frame‘ by
the impact of the roller therewith.
The features. and advantages of the invention
will appear more readily from, the following .de
scription, reference being had to the accompany
ing drawings, wherein a preferred form of' the
invention is shown.
'
In the drawings—
'
1
3
.
.
Fig. 1 is a plan view of a portion of a dupli
30
eating machine embodying therinventionfcertain
parts ofthe mechanism being broken away for
the sake of clearness;
Fig. 2 is a sectional view. on the line 2-2
35
of
Fig.
1;
>
'
.
.
Fig. 3 is a sectional view on the line 3—3 ‘of
a'bearing block"33,'_whi'ch rides inja slot .34 pro~
videdinjthe ‘corresponding end ‘frame. member
"29 or 30. .A's‘pri'ng,??‘isseated'in'arecess35’; 25
which, opens onto the ‘slot 34. _ The “springv 35
yieldingly presses the. bearing blocks. 33 down
wardly against asetfscrew 3B, which is threaded
into a plate 37. Theplate 31 is mounted on the‘
end frame member'.Z9_.or'3il'.
'
_
,
1 "30
_ On the freeends of the ‘stub shafts 3i and 32,
a pair of lihks'39. and 40 are provided. ‘ These
links, which are outside‘ of the’yadjacent end
frame members 29 and ?aareslotted to receive
the shafts 3|v and '32, so as._tO__permit alimited'
amount of play. The‘ links 39, and!!!) are con
nected to a pair of arms“. and42, ‘which arms
Fig. 1;
Fig. 4 is a sectional View similar to Fig.3 and. 'are keyed .on ‘a "pair" of pinsfM' and?45,_pro
tatably' journalled inthe-end ‘frames '29‘ and_30._
showing a changed position of the parts;
40
Fig. 5 is a sectional view on the line 5—5 of
Fig.
2.
a.
I
.
-
»
~
Referring now to the drawings, in which va
preferred embodiment of the invention .is illus
trated, the numerals l0 and I! indicate side
frames of the machine, in which a drum I2 is
journalled for rotation. The drum l2 has a
Inside the frames 28 and 30, the pins,“ and 45-140
have a- pair of arms‘AB and 41 secured: thereto.
In the prior ‘applications hereinbefore men’
tioned,,there is provided a paper guide 48 which,
in normalv operating position, projects upwardly"
over the drum-inthe position’fshown in‘ Figs. 2'45
3 and 4. .Thejcopy sheets, suchvas indicated at
49, after being fed from .the . table I8, lie up
gelatin-band l3 thereon and is provided with a
pair of spindles I4, and I5, upon which the oppo
site ends of the gelatin band 13 are wound. ,The
against this paper guidefuntilthey are] let down
drum i2 is mounted upon a shaft l6 ‘and is
adapted to be driven from a suitable source of
power such as a motor (but not shown) through
a reduction gear ll, as will be readily under
plates 29; and 38 vby , suitable arms ‘5!! and a
shaft 5|. Each arm 50 ‘carries’a roller '52'which'
into contact with thev gelatin band ‘I3 o-nthe
drum l2.. The guide li8.is"pivoted. to the‘end
is adapted to rest upon the adjacent end plate'29
stood. A copy sheet feed table I8 is adapted to or 39 when the paper guide‘v is in‘normall operat- '
support sheets being fed to the drum12 by means ing position. When the paper- guide is movediis5
2
2,131,112
forward about the shaft 5|, the arms 50 at the
side of the paper guide engage the free ends of
the arms 46 and 41, so as to move the arms 46
and 41 in a counterclockwise direction.
The movement of the arms 46 and 4'! in a
counterclockwise direction lifts the platen roller
band on said drum, means guiding sheets to said
drum, a platen roller adapted to press the sheets
against the band on said drum, mounting means
for said platen roller including yielding means
adapted to hold it in the path of the advancing
band, ‘lever means connected with said roller and
28 out of its printing position. ‘This enables the operable to lift the roller out of the path of said
operator to prevent the platen roller 28 from band, and lever engaging means on said drum
coming in contact with the band I3 any time he ‘ adapted to move the lever means just in advance
10 desires to do so.
of the platen roller meeting the band and thereby
Means are also provided whereby the yielding cause the platen roller to be lifted over the ad
mounting of the platen roller, by means of the
vancing edge of the band.
blocks‘ 33 and springs 35, may be utilized to auto
2. In a duplicating machine, a duplicating
drum, means to rotate said drum, a duplicating
band on said drum, means guiding sheets to said 15
drum, a platen roller adapted to press the sheets
matically prevent damage to the gelatin band l3.
15 On the side frames 29 and 30, there are mounted
a pair of levers 53 and 54. They are supported
'
on pins 55 and 56, mountedon the side frames ‘ against the band on said drum, mounting means
for said platen roller including yielding means
slot 51 therein, which slot receives the correspond
adapted‘ to hold it in the path of the advancing
20 ing st-ub shaft 3| or 32, so that, if the levers 53 band, lever means connected with said roller and
and 54 are turned about the pins 55 and 56, they operable to lift the roller out of the path of said
will move the stub shafts 3| and 32, and the platen band, said lever means comprising a lever at each
roller 28, toward and away from the position of end of said platen roller, and rollers on the drum
the platen roller shown in Fig. 3. In order to for engaging said levers.
'
25 move the levers 53 and 54, the free ends of the
3. In a duplicating machine, a duplicating,
levers are turned and ?attened to form cam por
drum, means to rotate said drum, a duplicating
tions 58 and 59. The cam. portions curve out
band on said drum, means guiding sheets to said
wardly at the free ends of the levers, with a drum, a platen roller adapted to press the sheets
smooth curve, as is shown best in Figs. 2 and 3
against the bandon said drum, mounting means
'30 at 60. The drum |2 carries cam rollers 6| and 62
for said platen roller including yielding means,
at its opposite ends, which cam rollers are adapt
adapted to hold it in the path of the advancing
ed to engage the free ends 58 and 59 of the levers band, lever means connected with said roller and
53 and 54. The position of the rollers 6| and 62
operable to lift the roller out of the path of said
with respect to the advancing edge of the gelatin band, said lever means including a manually op
35 band I3 is such that the platen roller 28 is lifted erable lever and a drum operated lever.
by the levers 53 and 54 just as the advanced edge
4. In a duplicating machine, a duplicating“
of the gelatin is almost up to the platen roller. drum means to rotate said drum, a duplicating
The rollers 6| and 62 then pass onto the curved band on said drum, means guiding sheets to said
portions 60 of the levers 53 and 54, so as to let the drum, a platen roller adapted to press the sheets
.40 platen roller descend gradually and radially onto against the bandon said drum, mounting means
the gelatin band, or, to be more exact, onto the for said platen roller including yielding means
copy sheet which has been fed between the gela
adapted to hold it in the path of the advancing
tin band‘ and the platen roller and adhered to band, lever means connected with said roller and
the advancing edge of the gelatin band.
operable to lift the roller out of the path of said
,45 In this fashion, the impact of the gelatin band band, said lever means including a manually
against the platen roller is no longer in the direc
operable lever and a drum operated lever, a
tion of rotation of the drum to any appreciable shaft carrying said platen roller, a link having one
extent. It is possible, with the above mechanism, end connected to the shaft and the other end con
to quickly bring the platen roller down on the nected to said manually operable lever, and said
. ,50 copy sheet at the advancing end of the gelatin
drum operated lever being connected to said
50
‘band. This is accomplished with the present in
shaft.
.
‘vention in such a fashion as to prevent damage
5. In a duplicating machine, a duplicating
to the gelatin band by the force of the impact drum, means to rotate said drum, a duplicating
’ due to the speed of rotation of the drum.
band on said drum, means guiding sheets to said
55 In my prior application, Serial No. 55,969, means‘ drum, a platen roller adapted to press the sheets
were provided on the drum and the platen roller against the band on said drum, mounting means
to take the impact before the roller contacted for said platen roller including yielding means
the gelatin band. The present invention differs adapted to hold it in the path of the advancing
from that by providing means for eliminating the band, lever means connected with said roller and
'
.60 impact.
operable to lift the roller out of the path of said
While the preferred embodiment of the inven
band, stub shafts at the ends of said platen roller
tion has been shown and described, it is tov be and journalled in said mounting means, said
understood that it is capable of many modi?ca
lever means being connected to said stub shafts
tions. Changes, therefore, in the construction hereby to lift the stub shafts in their mounting
65 and arrangement may be made without departing means when the lever means is lifted, and lever»
from the spirit and scope of the invention, as dis
engaging means on said drum adapted to move 65
closed in the appended claims, in which it is the the lever means just in advance of the platen roll
intention to claim all novelty inherent in the in
er meeting the band and thereby cause the platen
vention as broadly as possible, in view of the prior roller to be lifted over the advancing edge of the
band.
70 art.
70
Having thus described the invention, what I
6. In a duplicating machine, a duplicating
- claim as new and desire to secure by Letters Pat
drum, means to rotate said drum, a duplicating
ent is:
band on said drum, means guiding sheets to said
1. In a duplicating machine, a duplicating drum, a platen roller adapted to press the sheets
c-. 75 drum, means to rotate said drum, a duplicating against the band on said drum, mounting means 75.
29 and 30. Each lever 53 and 54 has an elongated .
2,131,112
for said platen roller including yielding means
adapted to hold it in the path of the advancing
band, lever means connected with said roller and
operable to lift the roller out of the path of said
band, stub shafts at the ends of said platen roller
and journalled in said mounting means, said lever
means being connected to said stub shafts where
3.
by to lift the stub shafts in their mounting means
when the lever means is lifted, and lever engag
ing means on said drum adapted to move the
lever means just in advance of the platen roller
meeting the band and thereby cause the platen
roller to be lifted over the advancing edge of the
band, said lever means comprising a lever at
by to lift the stub shafts in their mounting means _ each end of said platen roller, and rollers on the
drum for engaging said levers, said levers having
when the lever means is lifted, and lever engag
roller engaging surfaces curving away from the 10
10 ing means on said drum adapted to move the lever drum at the free ends of the levers.
means just in advance of the platen roller meet
8. In a duplicating machine, a duplicating
ing the band and thereby cause the platen roller
drum,
means to rotate said drum, a duplicating
to be lifted over the advancing edge of the band,
said lever means comprising a lever at each end band on said drum, means‘ guiding sheets to said
drum, a platen roller adapted to press the sheets 15
15 of said platen roller, and rollers on the drum for against the band on said drum, mounting means
engaging said levers.
‘
'I. In a duplicating machine, a duplicating ‘for said platen roller including yielding means
drum, means to rotate said drum, a duplicating adapted to hold it in the path of the advancing
band on said drum, means guiding sheets to said band, lever means connected with said roller and 20
operable to lift the roller out of the path of said
20 drum, a platen roller adapted to press the sheets band, and lever engaging means on said drum
against the band on said drum, mounting means
for said platen roller including yielding means adapted to move'the lever means just in advance
adapted to hold it in the path of the advancing of the platen roller meeting the band and thereby
band, lever means connected with said roller and cause the platen roller to be lifted over the ad 25
vancing edge of the band, said lever engaging
25 operable to lift the roller out of the path of said means comprising a roller carried by the drum.
band, stub shafts at the ends of said platen roller
and journalled in said mounting means, said lever
ALFRED MARCHEVr
means being connected to said stub shafts where
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